Physics Collision For Class11

COLLISION

When
one body struck another body, the collision is said to occurs in two .

TYPE
OF COLLISION

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ELASTIC COLLISION

A
collision in which there is absolute no loss of kinetic energy is called
Elastic Collision.

Example-
The collision between two Ivary balls is an example of elastic collision.

CHARACTERISTIC
OF ELASTIC COLLISION

Linear
momentum is conserved

Kinetic
energy is conserved

Total
energy is conserved

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INELASTIC COLLISION

A
collision in which there occurs in some loss of kinetic energy is called Inelastic Collision.

Example
– A ball is dropped from a certain height and after collision with the ground
it could not reach at the same position then the collision of the ball with
ground is an example of Inelastic Collision.

CHARACTERISTIC
OF INELASTIC COLLISION

Linear
momentum is conserved(Because no
external force is acting on the body)

Kinetic
energy is not conserved

Total
energy is not conserved

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PERFECT INELASTIC COLLISION

A
collision in which there occurs maximum
loss of energy is called Perfect Inelastic Collision.

Example-
mud is thrown on the wall it will stick to wall is an example of Perfect
Inelastic Collision.

CHARACTERISTIC
OF PERFECT INELASTIC COLLISION

Linear
momentum is conserved

Kinetic
energy is not conserved

Total
energy is not conserved

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COFFICENT OF RESTITUTION (e)

Before
relative velocity = U1 – U2

After
relative velocity = V2 – V1

Coefficient of restitution is defined as the ratio of relative velocity of separation after
collision to the relative velocity of approach before collision.

e
= V2 – V1 / U1 – U2

If
e = 1 (Then it is called Elastic Collision)

If
e = 0 (Then it is called Perfectly Inelastic Collision)

If 0 < e
< 1 (Then it is called Inelastic Collision)

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DERIVITION OF COLLISION OF VELOCITY OF
ELASTIC COLLISION

When
two body of different mass when two body as moving with different velocity in
same straight line and after collision moves in same straight line collision is
said to be called Elastic Collision.

Consider
two body mass M1 and M2 moving with the velocity U1
and U2 in same straight line
if U1 > U2 they
collide and after collision they move with velocity with V1 and V2
in a straight same line.

As
the collision is elastic , the linear momentum is conserved therefore the